function (self, unitId, unitFrame, envTable)

    --settings:
    --show cast icon
    envTable.ShowIcon = true
    --anchor icon on what side
    envTable.IconAnchor = "right" --accep 'left' 'right'
    --fine tune the size of the icon
    envTable.IconSizeOffset = 1

    --shield for non interruptible casts
    envTable.ShowShield = true
    envTable.ShieldTexture = [[Interface\GROUPFRAME\UI-GROUP-MAINTANKICON]]
    envTable.ShieldDesaturated = true
    envTable.ShieldColor = {1, 1, 1 ,1}
    envTable.ShieldSize = {10, 12}

    --private:
    function envTable.UpdateIconPosition (unitFrame)
        local castBar = unitFrame.castBar
        local icon = castBar.Icon
        local shield = castBar.BorderShield

        if (envTable.ShowIcon) then
            icon:ClearAllPoints()

            if (envTable.IconAnchor == "left") then
                icon:SetPoint ("topright", unitFrame.healthBar, "topleft", -1, envTable.IconSizeOffset)
                icon:SetPoint ("bottomright", unitFrame.castBar, "bottomleft", -1, 0)

            elseif (envTable.IconAnchor == "right") then
                icon:SetPoint ("topleft", unitFrame.healthBar, "topright", 1, envTable.IconSizeOffset)
                icon:SetPoint ("bottomleft", unitFrame.castBar, "bottomright", 1, 0)

            end

            icon:SetWidth (icon:GetHeight())
            icon:Show()

        else
            icon:Hide()

        end

        if (envTable.ShowShield and not castBar.canInterrupt) then
            shield:Show()
            shield:SetAlpha (1)
            shield:SetTexCoord (0, 1, 0, 1)
            shield:SetVertexColor (1, 1, 1, 1)

            shield:SetTexture (envTable.ShieldTexture)
            shield:SetDesaturated (envTable.ShieldDesaturated)

            if (not envTable.ShieldDesaturated) then
                shield:SetVertexColor (DetailsFramework:ParseColors (envTable.ShieldColor))
            end

            shield:SetSize (unpack (envTable.ShieldSize))

            shield:ClearAllPoints()
            shield:SetPoint ("center", castBar, "left", 0, 0)

        else
            shield:Hide()

        end